EP1021984A3 - Automatic optometer evaluation method using data over a wide range focusing positions - Google Patents

Automatic optometer evaluation method using data over a wide range focusing positions Download PDF

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Publication number
EP1021984A3
EP1021984A3 EP00100692A EP00100692A EP1021984A3 EP 1021984 A3 EP1021984 A3 EP 1021984A3 EP 00100692 A EP00100692 A EP 00100692A EP 00100692 A EP00100692 A EP 00100692A EP 1021984 A3 EP1021984 A3 EP 1021984A3
Authority
EP
European Patent Office
Prior art keywords
optometer
derived function
cylinder
optical system
refractive optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00100692A
Other languages
German (de)
French (fr)
Other versions
EP1021984A2 (en
Inventor
David A. Dr. Luce
Matthew Severns
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leica Microsystems Inc
Original Assignee
Leica Microsystems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leica Microsystems Inc filed Critical Leica Microsystems Inc
Publication of EP1021984A2 publication Critical patent/EP1021984A2/en
Publication of EP1021984A3 publication Critical patent/EP1021984A3/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eye Examination Apparatus (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A method and apparatus for measuring refractive properties of a refractive optical system by fitting measurement data points to a derived function are disclosed. In a preferred embodiment relating to an automatic objective optometer, each data point represents a peak signal amplitude extracted from a scan of a plurality of pixels on an area detector array receiving light from the illuminated refractive optical system at a particular optometer position. The derived function describes a relationship between the peak pixel signal and optometer position based on changing focusing conditions of light at the detector array, which correspond to focusing conditions at an image plane of the refractive optical system under a confocal arrangement. A first derived function is applied for fast and slow sphere optometer sweeps through broad and refined ranges and includes a pair of poles at first and second astigmatic focal points to give the magnitude of sphere and cylinder powers of the eye, and a second derived function is applied for a cylinder sweep varying the axis of a non-zero cylinder component introduced to the illuminating light and includes a single pole for giving the cylinder axis.
EP00100692A 1999-01-21 2000-01-14 Automatic optometer evaluation method using data over a wide range focusing positions Withdrawn EP1021984A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US234723 1999-01-21
US09/234,723 US6042232A (en) 1999-01-21 1999-01-21 Automatic optometer evaluation method using data over a wide range of focusing positions

Publications (2)

Publication Number Publication Date
EP1021984A2 EP1021984A2 (en) 2000-07-26
EP1021984A3 true EP1021984A3 (en) 2001-06-20

Family

ID=22882537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00100692A Withdrawn EP1021984A3 (en) 1999-01-21 2000-01-14 Automatic optometer evaluation method using data over a wide range focusing positions

Country Status (3)

Country Link
US (1) US6042232A (en)
EP (1) EP1021984A3 (en)
JP (1) JP3270751B2 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6816248B2 (en) * 2001-04-26 2004-11-09 Reichert, Inc. Hand-held automatic refractometer
US6746121B2 (en) * 2001-04-27 2004-06-08 Denwood F. Ross Defocus and astigmatism compensation in a wavefront aberration measurement system
US6741359B2 (en) * 2002-05-22 2004-05-25 Carl Zeiss Meditec, Inc. Optical coherence tomography optical scanner
DE10300322A1 (en) * 2003-01-09 2004-07-29 Oculus Optikgeräte GmbH Eye refractometer and method for operating an eye refractometer
US7556378B1 (en) 2003-04-10 2009-07-07 Tsontcho Ianchulev Intraoperative estimation of intraocular lens power
AU2005234778B2 (en) 2004-04-20 2011-04-21 Alcon Inc. Integrated surgical microscope and wavefront sensor
WO2007082146A2 (en) * 2006-01-05 2007-07-19 Daphne Instruments, Inc. Autorefractor for detecting light intensities to extract higher-order refractions and method for use
CN101099649B (en) * 2006-07-03 2011-02-02 苏州金莱克家用电器有限公司 Whirlwind silencing device for vacuum cleaner and dust-cup device containing the same
US7594729B2 (en) 2007-10-31 2009-09-29 Wf Systems, Llc Wavefront sensor
US8550624B2 (en) 2008-11-06 2013-10-08 Wavetec Vision Systems, Inc. Optical angular measurement system for ophthalmic applications and method for positioning of a toric intraocular lens with increased accuracy
US8876290B2 (en) * 2009-07-06 2014-11-04 Wavetec Vision Systems, Inc. Objective quality metric for ocular wavefront measurements
WO2011008606A1 (en) 2009-07-14 2011-01-20 Wavetec Vision Systems, Inc. Determination of the effective lens position of an intraocular lens using aphakic refractive power
JP5837489B2 (en) 2009-07-14 2015-12-24 ウェーブテック・ビジョン・システムズ・インコーポレイテッドＷａｖｅｔｅｃ Ｖｉｓｉｏｎ Ｓｙｓｔｅｍｓ， Ｉｎｃ． Ophthalmic equipment
DE102011083353A1 (en) * 2011-09-23 2013-03-28 Carl Zeiss Ag Imaging device and imaging method
DE102011083354B3 (en) * 2011-09-23 2013-03-28 Carl Zeiss Ag Display device and display method
US9072462B2 (en) 2012-09-27 2015-07-07 Wavetec Vision Systems, Inc. Geometric optical power measurement device
SE541262C2 (en) * 2016-11-15 2019-05-21 Heads Stockholm Ab Method and device for eye metric acquisition
DK3668369T3 (en) 2017-08-14 2021-05-03 Optos Plc NETHEAT POSITION TRACKING
TWI720353B (en) * 2018-10-18 2021-03-01 晉弘科技股份有限公司 Fundus camera and method for self-shooting fundus
CN111772574B (en) * 2020-06-06 2023-06-27 宁波明星科技发展有限公司 Method and device for eliminating defocus during wavefront aberration measurement
US12048484B2 (en) 2021-04-21 2024-07-30 Amo Development, Llc Compact autocylinder compensation module for autorefractor and autorefractor with autocylinder compensation module
CN118339500A (en) * 2022-03-28 2024-07-12 Tdk株式会社 Projection module and retina projection display device comprising same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888569A (en) * 1973-05-09 1975-06-10 Tropel Apparatus and method of measuring the refractive error of an eye
US4611913A (en) * 1982-04-19 1986-09-16 Sugino Paul S Method and apparatus for analyzing ophthalmic elements and the like
EP0600455A1 (en) * 1992-11-30 1994-06-08 Nikon Corporation Apparatus for measuring the refractive power of an optical system
EP0625332A2 (en) * 1993-04-16 1994-11-23 Canon Kabushiki Kaisha Viewing apparatus
EP0663179A1 (en) * 1994-01-12 1995-07-19 Ciba-Geigy Ag Spatial refractometer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5173790A (en) * 1990-06-29 1992-12-22 Harris Corporation Adaptive filter with correlation weighting structure
US5331394A (en) * 1992-04-10 1994-07-19 Metaphase Corporation Automated lensometer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888569A (en) * 1973-05-09 1975-06-10 Tropel Apparatus and method of measuring the refractive error of an eye
US4611913A (en) * 1982-04-19 1986-09-16 Sugino Paul S Method and apparatus for analyzing ophthalmic elements and the like
EP0600455A1 (en) * 1992-11-30 1994-06-08 Nikon Corporation Apparatus for measuring the refractive power of an optical system
EP0625332A2 (en) * 1993-04-16 1994-11-23 Canon Kabushiki Kaisha Viewing apparatus
EP0663179A1 (en) * 1994-01-12 1995-07-19 Ciba-Geigy Ag Spatial refractometer

Also Published As

Publication number Publication date
JP3270751B2 (en) 2002-04-02
US6042232A (en) 2000-03-28
JP2000232960A (en) 2000-08-29
EP1021984A2 (en) 2000-07-26

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